ABAP Select data from SAP table REXCAT_RAB_LIST_LINE_ITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REXCAT_RAB_LIST_LINE_ITEM table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to REXCAT_RAB_LIST_LINE_ITEM. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the REXCAT_RAB_LIST_LINE_ITEM table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_REXCAT_RAB_LIST_LINE_ITEM TYPE STANDARD TABLE OF REXCAT_RAB_LIST_LINE_ITEM,
      WA_REXCAT_RAB_LIST_LINE_ITEM TYPE REXCAT_RAB_LIST_LINE_ITEM,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <REXCAT_RAB_LIST_LINE_ITEM> TYPE REXCAT_RAB_LIST_LINE_ITEM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REXCAT_RAB_LIST_LINE_ITEM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REXCAT_RAB_LIST_LINE_ITEM
  INTO TABLE IT_REXCAT_RAB_LIST_LINE_ITEM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXCAT_RAB_LIST_LINE_ITEM
*  INTO TABLE @DATA(IT_REXCAT_RAB_LIST_LINE_ITEM2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_REXCAT_RAB_LIST_LINE_ITEM INDEX 1 INTO DATA(WA_REXCAT_RAB_LIST_LINE_ITEM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REXCAT_RAB_LIST_LINE_ITEM ASSIGNING <REXCAT_RAB_LIST_LINE_ITEM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXCAT_RAB_LIST_LINE_ITEM>-ADDITIONAL_INFORMATION = 1.
<REXCAT_RAB_LIST_LINE_ITEM>-ALT_QTY = 1.
<REXCAT_RAB_LIST_LINE_ITEM>-ALT_QTY_UNIT = 1.
<REXCAT_RAB_LIST_LINE_ITEM>-BOXES = 1.
<REXCAT_RAB_LIST_LINE_ITEM>-CHARGE_NUMBER = 1.

ENDLOOP.

LOOP AT IT_REXCAT_RAB_LIST_LINE_ITEM INTO WA_REXCAT_RAB_LIST_LINE_ITEM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXCAT_RAB_LIST_LINE_ITEM-CLASSIFICATION, sy-vline,
  WA_REXCAT_RAB_LIST_LINE_ITEM-COLOR, sy-vline,
  WA_REXCAT_RAB_LIST_LINE_ITEM-SERIAL_NUMBER, sy-vline,
  WA_REXCAT_RAB_LIST_LINE_ITEM-SIZE, sy-vline,
  WA_REXCAT_RAB_LIST_LINE_ITEM-WEIGHT, sy-vline,
  WA_REXCAT_RAB_LIST_LINE_ITEM-WEIGHT_UNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXCAT_RAB_LIST_LINE_ITEM you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_REXCAT_RAB_LIST_LINE_ITEM TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_REXCAT_RAB_LIST_LINE_ITEM INTO WA_REXCAT_RAB_LIST_LINE_ITEM.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_REXCAT_RAB_LIST_LINE_ITEM_STR, 
ADDITIONAL_INFORMATION TYPE STRING,
ALT_QTY TYPE STRING,
ALT_QTY_UNIT TYPE STRING,
BOXES TYPE STRING,
CHARGE_NUMBER TYPE STRING,
CLASSIFICATION TYPE STRING,
COLOR TYPE STRING,
SERIAL_NUMBER TYPE STRING,
SIZE TYPE STRING,
WEIGHT TYPE STRING,
WEIGHT_UNIT TYPE STRING,
ARTICLE_NUMBER TYPE STRING,
BILLERS_ORDER_REF TYPE STRING,
ORDER_ID TYPE STRING,
ORDER_POSITION_NUMBER TYPE STRING,
DELIVERY TYPE STRING,
ADDRESS TYPE STRING,
ADDRESS_IDENTIFIER TYPE STRING,
CONTACT TYPE STRING,
COUNTRY TYPE STRING,
COUNTRY_CODE TYPE STRING,
EMAIL TYPE STRING,
NAME TYPE STRING,
PHONE TYPE STRING,
POBOX TYPE STRING,
SALUTATION TYPE STRING,
STREET TYPE STRING,
TOWN TYPE STRING,
ZIP TYPE STRING,
EXTENSION TYPE STRING,
SV_EXTENSION TYPE STRING,
CUSTOM TYPE STRING,
DATE TYPE STRING,
DELIVERY_ID TYPE STRING,
DESCRIPTION TYPE STRING,
PERIOD TYPE STRING,
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,
EXTENSION TYPE STRING,
SV_EXTENSION TYPE STRING,
CUSTOM TYPE STRING,
DESCRIPTION TYPE STRING,
DISCOUNT_FLAG TYPE STRING,
INVOICE_RECIPIENT_ORDER_REF TYPE STRING,
ORDER_ID TYPE STRING,
ORDER_POSITION_NUMBER TYPE STRING,
LINE_ITEM_AMOUNT TYPE STRING,
POSITION_NUMBER TYPE STRING,
QUANTITY TYPE STRING,
QUANTITY_UNIT TYPE STRING,
RED_AND_SUR_LINE TYPE STRING,
REDUCTION_LIST_LINE_ITEM TYPE STRING,
SURCHARGE_LIST_LINE_ITEM TYPE STRING,
TAX_RATE TYPE STRING,
TAX_CODE TYPE STRING,
UNIT_PRICE TYPE STRING,
EXTENSION TYPE STRING,
SV_EXTENSION TYPE STRING,
CUSTOM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXCAT_RAB_LIST_LINE_ITEM_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-ADDITIONAL_INFORMATION sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-ALT_QTY sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-ALT_QTY_UNIT sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-BOXES sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-CHARGE_NUMBER sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-CLASSIFICATION sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-COLOR sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-SERIAL_NUMBER sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-SIZE sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-WEIGHT sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-WEIGHT_UNIT sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-ARTICLE_NUMBER sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-BILLERS_ORDER_REF sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-ORDER_ID sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-ORDER_POSITION_NUMBER sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-DELIVERY sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-ADDRESS sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-ADDRESS_IDENTIFIER sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-CONTACT sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-COUNTRY sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-COUNTRY_CODE sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-EMAIL sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-NAME sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-PHONE sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-POBOX sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-SALUTATION sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-STREET sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-TOWN sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-ZIP sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-EXTENSION sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-SV_EXTENSION sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-CUSTOM sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-DATE sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-DELIVERY_ID sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-DESCRIPTION sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-PERIOD sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-DATE_FROM sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-DATE_TO sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-EXTENSION sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-SV_EXTENSION sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-CUSTOM sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-DESCRIPTION sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-DISCOUNT_FLAG sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-INVOICE_RECIPIENT_ORDER_REF sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-ORDER_ID sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-ORDER_POSITION_NUMBER sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-LINE_ITEM_AMOUNT sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-POSITION_NUMBER sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-QUANTITY sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-QUANTITY_UNIT sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-RED_AND_SUR_LINE sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-REDUCTION_LIST_LINE_ITEM sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-SURCHARGE_LIST_LINE_ITEM sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-TAX_RATE sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-TAX_CODE sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-UNIT_PRICE sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-EXTENSION sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-SV_EXTENSION sy-vline 
WA_REXCAT_RAB_LIST_LINE_ITEM_STR-CUSTOM sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.